Removing double throttle blades
#5
Original Gangster/Rotary!
iTrader: (213)
Word. Do NOT NOT NOT mess with the plates in the TB.
Removing the pair of plates in the upper portion of the UIM is a bit of a pain, the screws are mushroomed on the backside so they need to be drilled out. Then use an air saw or something similar to cut through the shaft and pull it out in pieces. Lastly, best thing is to have the open hole on the backside welded up as there really isn't enough surrounding material for a block off plate to seal adequately.
Removing the pair of plates in the upper portion of the UIM is a bit of a pain, the screws are mushroomed on the backside so they need to be drilled out. Then use an air saw or something similar to cut through the shaft and pull it out in pieces. Lastly, best thing is to have the open hole on the backside welded up as there really isn't enough surrounding material for a block off plate to seal adequately.
#7
Just an FYI... The FD has the No. 2 secondary throttle plates in the UIM, and the FC has the No. 2 secondary throttle plates in the throttlebody itself. The systems function in a similar way, but the FD system is computer controlled by a vacuum solenoid while the FC system is controlled mechanically through a coolant-temperature activated vacuum valve.
The whole point of the system is to prevent possible damage from abuse, drivers beating on the car before it's warmed up. So the main throttle butterflies are still opened by the throttle cable but this extra set is used during cold operation. Modern engines have electronic throttles so this type of system isn't necessary (and neither are a lot of other things like ISC valves).
The whole point of the system is to prevent possible damage from abuse, drivers beating on the car before it's warmed up. So the main throttle butterflies are still opened by the throttle cable but this extra set is used during cold operation. Modern engines have electronic throttles so this type of system isn't necessary (and neither are a lot of other things like ISC valves).
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Jeff20B
1st Generation Specific (1979-1985)
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09-16-18 07:16 PM